Nonlocal surface dipoles and vortices

Abstract

We predict the existence and address the stability of two-dimensional surface solitons featuring topologically complex shapes, including dipoles, vortices, and bound states of vortex solitons, at the interface of nonlocal thermal media. Unlike their counterparts in bulk media, surface dipoles are found to be stable in the entire existence domain. Surface vortices are found to exhibit strongly asymmetric intensity and phase distributions, and are shown to be stable, too. Bound states of surface vortex solitons belong to a novel class of surface solitons having no counterparts in bulk media. Such states are found to be stable provided that their energy flow does not exceed an upper threshold. Our findings constitute the first known example of topologically complex solitons located at nonlocal two-dimensional interfaces.

20 pages, 5 figures, to appear in Phys. Rev. A

References in corpus (6)

• Observation of attraction between dark solitons
• Two-dimensional multi-pole solitons in nonlocal nonlinear media
• Stability of two-dimensional spatial solitons in nonlocal nonlinear media
• Multipole vector solitons in nonlocal nonlinear media
• Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry
• Lattice-supported surface solitons in nonlocal nonlinear media